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Maher Kayal

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Related publications (165)

Punch-through impact ionization MOSFET (PIMOS): From device principle to applications

Didier Bouvet, Maher Kayal, Vincent Pott, Mihai Adrian Ionescu, Cédric Meinen, Kirsten Emilie Moselund

In the present work a punch-through impact ionization MOSFET (PIMOS) is presented, which exploits impact ionization in low-doped body-tied [Omega]- and tri-gate structures to obtain abrupt switching (3-10 mV/decade) combined with a hysteresis in the ID(VDS ...

2008

RF power amplifier employing a frequency-tunable impedance matching network based on coupled inductors

Maher Kayal

Coupled inductors can be used as tunable inductances. Employing coupled inductors in the output impedance matching network of an RF power amplifier leads to superior performance when operating in more than one frequency band. As proof of this concept, the ...

2008

Emulation du réseau électrique à l’aide de circuits électroniques

Sidi-Rachid Cherkaoui, Maher Kayal, Laurent Fabre, Ira Nagel

2007

A low-power strategy for delta-sigma modulators

Maher Kayal, Danica Stefanovic

This paper presents a hybrid continuous-discrete-time Delta-Sigma modulator for portable communication systems following a low-power strategy. The proposed design methodology is extendable to different specifications. A multi-bit technique has been introdu ...

2007

Structured design based on the inversion factor parameter: Case study of ΔΣ modulator system

Maher Kayal, Marc Pastre, Danica Stefanovic

This paper presents the design flow from system-level specifications to transistor-level design for three different fully-differential amplifiers composing the first and the second integrator of a second-order hybrid multi-bit ΔΣ modulator. The circuit-lev ...

2007

New error amplifier topology for Low Dropout Voltage regulators using compound OTA-OPAMP

Maher Kayal

Typical Low Dropout Voltage regulators (LDO), uses an error amplifier in a linear closed loop. The main advantage of such linear regulators is the low standby current due to the absence of switching. In addition, a fully integrated linear regulator with no ...

2007

Toward a power system emulation using analog microelectronics solid state circuits

Sidi-Rachid Cherkaoui, Maher Kayal, Laurent Fabre, Ira Nagel

An analog electronics emulation solution is investigated in order to assess the state of a power system facing dynamic phenomena such as the transient stability. Two approaches are studied: DC emulation and AC emulation. Both are intended to be integrated ...

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A Hall sensor analog front end for current measurement with continuous gain calibration

Maher Kayal, Marc Pastre

This paper presents a new technique for continuously calibrating the sensitivity of a current measurement microsystem based on a Hall magnetic field sensor. An integrated reference coil generates a magnetic field for calibration. Using a variant of the cho ...

2007

Electrical model of a single pixel SOI phototransistor relying on the transient charge pumping technique

Maher Kayal, Jean-Michel Sallese, Louis Harik

In this paper a floating body partially depleted SOI MOSFET used to measure light intensity using the transient charge pumping [1] is modeled through an equivalent electrical circuit. Essentially, photogenerated charges of the MOSFET are converted into a c ...

2007

Digital calibration methodology applied to a sensor microsystem

Maher Kayal, Marc Pastre

This paper presents the application of a complete digital calibration methodology to the improvement of a Hall sensor-based current measurement microsystem. It is a step-by-step illustration of how generic calibration techniques and circuits can be used on ...

2006

SOI hall-sensor front end for energy measurement

Maher Kayal

The growing demand for the solid-state meters for power and energy measurement leads to the fully integrated Hall-sensor-based microsystem solutions. In this paper, a silicon-on-insulator (SOI) Hall-sensor-based. microsystem for energy measurements with dy ...

2006

Design methodology based on the analog blocks retargeting from bulk to FD SOI using EKV model

Maher Kayal

This paper presents a methodology of a basic analog blocks retargeting from bulk to fully depleted (FD) SOI technology. The design methodology is generally not related to the model used for the circuit simulations. However, the proposed one is closely link ...

2006

Capacitorless 1T DRAM sensing scheme with automatic reference generation

Michel Declercq, Maher Kayal, Serguei Okhonin, Marc Pastre, Louis Harik

To perform a current sensing in capacitorless 1-transistor (IT) DRAMs on SOI, we have developed a sensing scheme with automatic reference generation. The reference current is generated by an adjustable current source. The electrical calibration of the refe ...

2006

A dynamic supply CMOS RF power amplifier for 2.4GHz and 5.2GHz frequency bands

Maher Kayal, Cédric Meinen

An implementation of a dynamic supply RF power amplifier (PA) in 0.11 mu m CMOS technology occupying a total area of 1.35mm(2) is presented. Two-tone measurement results at 2.4 and 5.2GHz show that the system can deliver over 16dBm linear output power with ...

2006

Automatic calibration of Hall sensor microsystems

Maher Kayal, Marc Pastre

In many applications, a Hall element is used for contact-less measurement such as linear and angular positions, electrical current, power and energy, etc. The Hall element fabricated by means of CMOS technology features mediocre characteristics [R.S. Popov ...

2006

FD SOI Hall sensor electronics interfaces for energy measurement

Maher Kayal

This paper presents a SOI Hall sensor based microsystem for energy measurement. The mixed-mode signal circuitry has been entirely designed and integrated in the experimental 0.5 mu m fully depleted SOI 3 V technology. It consists of an integrated Hall elem ...

2006

PAD:A New Interactive Knowledge-Based Analog Design Approach

Maher Kayal, Marc Pastre, Danica Stefanovic

Kluwer Academic Publishers, Springer2005

Methodology for the Digital Calibration of Analog Circuits and Systems-with Case Studies

Maher Kayal, Marc Pastre

Springer2005

Automatic Calibration of Hall Sensor Microsystems

Maher Kayal

2005

A Hall Sensor-Based Current Measurement Microsystem with Continuous Gain Calibration

Maher Kayal, Marc Pastre

A novel technique for the continuous calibration of the sensitivity of Hall sensors is presented. Using an integrated coil and a new modulation/demodulation scheme, the sensitivity is measured and its drift eliminated. The obtained thermal drift is 50 ppm/ ...

2005

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